Improvement in stove-pipe dampers



N w; HA, vLu'rz ass-ign@ to himself s:

FEB 52813 PATl'iNTEn j In elfnlor.

srovE PIPE DAPER. i 1152260 YiA/'ihre sse s.

' .Fm'an. EXP Si, Self-j'aiusng, *f1 l l `"senr AND WILLIAM Bons, orsans PLAGE.

Letters Patent No. 112,260, dated February 28, 1871.

" IMPROVEMENT 'IN STOVE-'PIPE DAMPERS-a'hesaneeumnreuee-temmnmmanammpaeefmem {WILLIAM H. LU'rz, of the cityand county of Lancaster', `in the- State of Pennsylvania, have in-Nvcnted a Device tcr'onstitute `im Expansion Selfacting 4Safety-Damper-for StovePipes, of which the following is a 'speciiicatiom Theobject ofltliis'invention is`the application of the -wellfknown powerheat exerts in the expansionl of an I viron ormetallic bar, so combinedthat said expansion governs `the valve or damper.so as to decrease theamount of draught `aud always-adjust itself to the degree of temperaturewithin the stove-pipe, the parts so graduated as to be adjustable tovarious condtions.-

'.lhe thawing illustrates `the construction and appli-l vtiomy .4 I I 4f Figure 1 is a section of a stove-pipe, showing the external parte inperspective. f

Figure 2; the arrangement of the several parts, with the pipe-removed toshow the expansion-rod and valve or `damper within the pipe. v

A bxiefexplanation will' enable any one skilled in the, art to make andapply my invention, by reference to thedrawi ng'and letters thereon.

P, iig'. 2, is a section of, an Vordinary.stove-pipe of'` `any desireddiameter.

A stout rod oriron bar, A, nearly the length of a section', say twentyinches, is bent at` right angles at both ends, 1 1 a. I The "se ends arethrust through openings iliade in the lpipeto the outside, the upperbeing an oblong slot, to allow the inner bar A to expand, `'.lhe ends ofsaid `bar may project an inch and a quar- ,ter beyond the ontsideiofwthepipe above and below. I The upper enda' has'a shoulder, and passesthroughl the acting lever B, and on the `end a circular plate isriveted, betweeiiwhichplate and the shoulder the 1ever-bar B andtension-rod are confined. Y Thisl tension-rodi!` hooks through a holemade in "the head'of the `leverd'od'orbar B, the lower end of' saidtension-rod being secured through the lower end a of the extension-barby means of a screw Naud a pair `ofjam#n'uts, G' G. The lower end may bemore firmly vsecured byV a brace-plate, H. I

ilhe lever-bar Bisrbent inward to about the centerl between a' a, and isprovided with a headed pin, b, that tite into any'fof a. series ofnotches in a rack, O'.

, To one end of 'this notched rack oneend of an elbowed lever, D', issecured' by a pivot-joint. This lever D'connects in the angle with theshaft o f the damper E, so as to turn vthe saine.

The other arm of the elbowed lever shows aperforation, to which a weightmay be hung, if required, in certain cases to govern theaction. y

The elbow is, however, not essential. One leverarm would also act.

'The operation is easily understood. .As the heat', going up the pipe,expands, the inner bar A and the tension -rod F beingrigid, remote, andoutside, the expansive force can only operate on the upper end, which,by elevating the lever-bar` B, held-back by the tensionfrod, mustnecessarily act upon the notched rack 0,' connected with the elbowedlever, andthe damper within the pipe, to close the same more or 'thedraught too soon; but when once adjusted the degree of draught willalways be in conformity with .the degree of heat, and will not only beself-adjusting, but

prevent that excess of heat in stove-pipes that often provesdestruetiveto carpets or property.

is not new, nor do I claim euch a property.

What I claim as my invention, and desire to secure by Letters-Patent,isfj -.The combination 4and varrangeniel'it of. the `bar A c a',lever-bar B,Ia ck 0, a simple or elbowed lever, D,

` and tensionrod E, together with the damper E,operating-substantially-in thev manner and forthe pur pose specified.

Witnesses:

.Wim- B. WILEY,

JACOB STAUFFna.

WILLIAM H.- Lncrz';

I amaware that the mere expansion ot iron byheat

